I have a 1999 Oldsmobile bravada AWD smarttrak 4.3 liter and I'm wondering how does the AWD smarttrak work on it

 

The thread linked to below should answer all of your questions:
olds bravada smartrak..hows it work??

 

I read that 1 but it's for a 97 they could've changed something up for a 99 so it may or may not be the same as a 99

 

Don't get hung up in the first post. There is A LOT more detail just a few posts down that covers your application. I should know, I wrote a few of them.